MuscleNerd of the iPhone Dev Team has recently posted something interesting on his Twitter timeline about the iPhone 4S unlock status. According to the brain-member of the dev team, iPhone 4S unlock will be much easier than the iPhone 4 unlock which couldn’t be achieved by the team.

MuscleNerd posted the screenshot (shown above) saying it’s a “very promising 4S unlock”. However, this unlock won’t work on the iPhone 4, only iPhone 4S.

There was a trick which can unlock iPhone 4S, iPhone 4, and iPhone 3GS but it only works on AT&T and it survive for minutes.